the third harmonic of 49.1 MHZ is 147.3MHZ.  Interesting, that's my local 
VHF repeater frequency
Also, I wonder how wide the band width is on the transmitter?  if say 50K or 
something obnoxious like that for HQ audio, then it would slice into quite a 
bit of the ham band at the third harmonic.
I wonder if you check 98.2MHZ on an FM radio receiver if you might hear the 
same noise...that would be the second harmonic.

73
Colin, V A6BKX
----- Original Message ----- 
From: "Tom Brennan" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, April 24, 2012 2:06 PM
Subject: Re: some discoveries re: reception on ht and echo link.


> Linda, Advanced Bionics uses a 49.1 mHz uplink and a 106.6 downlink for 
> their
> units.  The uplink could be causing you a third harmonic problem although 
> it
> really shouldn't.
>
> To check this the easy way, you'll either need a hearing person or you'll 
> have
> to have some hearing with your implants shut down.  Set your ht for 
> maximum
> problem and shut down your implants.  If the noise in your receiver stops 
> you've
> probably found the problem and you'll then need to be checking for a 
> shielding
> issue if the problems happen at a distance of more than a few feet from 
> your
> implants.
>
> Tom
>
>
> Tom Brennan  KD5VIJ, CCC-A/SLP
> web page http://titan.sfasu.edu/~g_brennantg/sonicpage.html